We are told a lot that democracy is good. But the real point is that democracy is strong.
If there were a method to find the 1000 smartest people in a country, and if there were a method to find the 10% of those 1000 which have the best heart, these 100 would be much better leaders for the country than what democracy ever can achive.
But for the first, there is no such objective way to do this selection.
And for the second, such a government might be far away from what the average people want, so it would lack the needed support.
That is what makes democracy a strong system, that the gap between people and government is smaller than in other political systems, which reduces inner friction and inner loss of the system's power.